Radio Amateur Quiz Canadian License

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Question A-007-007-010

Why can a horizontal antenna closer to ground be advantageous for close range communications on lower HF bands?

Correct Answer

The ground tends to act as a reflector

Explanation

At low heights (e.g., less than λ/4), a horizontal antenna's radiation pattern emphasizes higher takeoff angles. These high-angle waves are suitable for Near Vertical Incidence Skywave (NVIS) propagation, providing good coverage for short to medium distances on lower HF bands.

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